PSYA01H3 Lecture Notes - Lecture 6: Natural Disaster, Random Assignment, Univariate
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They are pretty aware with where you are going with the experiment. It might not actually happen in the real world. By having extra groups we can see what the effects are. Group 1"s results are similar to group 3; group 2"s results are similar to group 4 showing that the stimulus is. Is the solution to the problems with external validity. Addresses the problem of the testing interaction of the stimulus. It does this by adding two extra groups in: group 1 and group 2 is the same as the classical experiment. having an effect. This is done to avoid problems from the testing situations. Quasi-experiment: that which looks like an experiment with no random assignment. Natural experiment: outcome: a stimulus varies through some unplanned event (natural disaster, war, disease) that happens to an. They can be replicated, as they are easily controlled, to see how valid they are.
